XOR and rotate is probably a good start. Kees Cook <[email protected]> wrote: >On Mon, Nov 11, 2013 at 12:07 PM, Ingo Molnar <[email protected]> wrote: >> >> * H. Peter Anvin <[email protected]> wrote: >> >>> Of course, perhaps we could just hash struct boot_params as a >starting >>> point? >> >> Yeah, that would be a good first step, before trying to parse DMI or >ACPI. >> Anything that is reasonably system dependent and gives at least some >> amount of unpredicability. > >Given the very limited nature of the early boot environment, what >would you recommend for the hashing routine itself? There's nothing in >boot/ that does any kind of "real" crypto hashing. Should I just XOR >the entire contents of boot_params together? > >-Kees
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